Texas Instruments DRV5055A4QDBZR

Overview

DRV5055A4QDBZR from Texas Instruments is a ratiometric linear Hall-effect sensor designed for precise analog magnetic field measurement in industrial and consumer systems. It delivers 12.5 mV/mT sensitivity at 5 V, ±169 mT linear sensing range, 20 kHz bandwidth, and operates from 3.3 V or 5 V supplies - enabling high-resolution position sensing in motor control feedback loops and tilt detection circuits.

For engineers reviewing the DRV5055A4QDBZR datasheet, DRV5055A4QDBZR pinout, DRV5055A4QDBZR application, or DRV5055A4QDBZR equivalent, key selection criteria include magnet temperature compensation (0.12%/°C), quiescent output at VCC/2, ±1 mA drive capability, low 130 nT/√Hz input-referred noise, and SOT-23 package compatibility with standard PCB assembly processes.

Technical Context

The DRV5055A4QDBZR implements a fully integrated ratiometric architecture where both quiescent voltage and sensitivity scale linearly with VCC - eliminating supply tolerance errors when paired with an ADC using the same VCC reference. Its internal temperature compensation actively adjusts sensitivity to counteract neodymium magnet drift across –40°C to 125°C.

This variant uses a single-ended analog output referenced to GND, with magnetic field detection oriented perpendicular to the top surface of the SOT-23 package. The Hall element is located 650 µm ±80 µm from the package top, enabling predictable field coupling in surface-mount configurations without mechanical recalibration.

Key Specifications

Pinout & Package

SOT-23 (DBZ) 3-pin surface-mount package measuring 2.92 mm × 2.37 mm with gull-wing leads; optimized for automated placement and reflow soldering on dense PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar linear Hall-effect sensor applications.

Compared with DRV5055A4QDBZR, DRV5053VAQDBZR lacks temperature compensation and operates only at 3.3 V, limiting use in automotive or industrial environments; TMAG5170AHQDGKR offers superior accuracy and axis flexibility but requires SPI interface redesign and forfeits direct analog integration.

Availability

DRV5055A4QDBZR is available at Aetrix Electronics and suitable for industrial automation, medical fluid monitoring, and consumer appliance designs requiring stable component supply, long-term manufacturability, and guaranteed traceability through TI's qualified production lines.

Supply support for DRV5055A4QDBZR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in magnetic sensing ICs and industrial-grade signal conditioning.

The DRV5055 product line was engineered specifically for contactless linear position and current sensing in harsh environments - delivering ratiometric stability, magnet temperature compensation, and robust EMC performance across –40°C to 125°C.

FAQ

What is the magnetic sensitivity of DRV5055A4QDBZR at 3.3 V supply?

The DRV5055A4QDBZR has a sensitivity of 7.5 mV/mT (typical) at 3.3 V supply voltage and 25°C ambient temperature. This value is confirmed in Section 5.6 of the official datasheet under Magnetic Characteristics, where it is specified as 7.1–7.9 mV/mT across process and temperature. At 3.3 V, the linear sensing range expands to ±176 mT, making DRV5055A4QDBZR suitable for low-voltage battery-powered applications requiring wide dynamic range.

Does DRV5055A4QDBZR support both north and south magnetic pole detection?

Yes, DRV5055A4QDBZR detects both north and south magnetic poles distinctly: a south pole near the marked top surface produces positive millitesla values and increases the output voltage above VCC/2, while a north pole produces negative millitesla values and decreases the output below VCC/2. This bipolar response is inherent to its linear Hall architecture and is verified in the Magnetic Response diagram (Figure 6-3) and functional description in Section 6.3.2 of the DRV5055A4QDBZR datasheet.

What is the recommended decoupling capacitor for DRV5055A4QDBZR?

Texas Instruments specifies a minimum 0.01 µF ceramic capacitor connected between VCC and GND, placed as close as possible to the DRV5055A4QDBZR pins. This value is explicitly stated in Table 4-1 (Pin Functions) and reinforced in Section 7.4 (Power Supply Recommendations). The capacitor stabilizes the internal bias circuitry and suppresses high-frequency noise that could modulate the analog output - critical for maintaining 130 nT/√Hz noise performance in sensitive position-sensing applications.

Can DRV5055A4QDBZR operate from a 4.0 V supply?

No, DRV5055A4QDBZR is not characterized for reliable operation at 4.0 V. The datasheet defines two disjoint recommended operating ranges: 3.0–3.63 V and 4.5–5.5 V. Between 3.63 V and 4.5 V lies an undefined crossover region where sensitivity becomes unpredictable due to internal threshold switching - explicitly noted in Section 6.3.5. For stable performance, DRV5055A4QDBZR must be powered within one of the two validated windows, never at 4.0 V.

How does the ratiometric architecture of DRV5055A4QDBZR improve system accuracy?

The ratiometric architecture of DRV5055A4QDBZR improves system accuracy by scaling both quiescent output (VQ) and sensitivity proportionally with VCC - so if VCC varies by ±5%, both offset and gain shift identically. When the downstream ADC uses the same VCC as its reference voltage, this correlation cancels supply-induced errors, yielding consistent digital codes regardless of rail tolerance. This behavior is quantified by VQRE ≤ ±0.2% and SRE ≤ ±2.5% in Section 5.6, directly enhancing repeatability in cost-sensitive industrial controllers using DRV5055A4QDBZR.